There continues to be misconceptions about hermies and feminized pollen. To quote the article FatBob referenced:
"A lot of people think we have created hermaphrodites, but we take 100% female clones, and apply a safe chemical so the clones produce abundant male flowers. Then we take that pollen and fertilize other females with it. Seeds from this method will usually grow out female.
Hermie plants do
not produce feminized pollen. Stressing individual bud sites on a pure female plant can induce those budsites to grow physically male buds, which in a sense makes it a hermaphrodite but not really. These female buds that are forced to grow outwardly as male are the ones that produce feminized pollen. It is very tricky to do on purpose, the stressing involves either light exposure during the dark cycle and/or application of a special hormone. TopPot, I would guess that either you didn't have a true hermie but had accidentally stressed your girl into this condition from a light leak or else you got VERY lucky.
Feminized seeds come from pollinating females with feminized pollen, which produces seeds that are only genetically female. You cannot identify females from males among regular seeds, at least not without a genetics lab and probably destroying the seed in the process.